Fix PathItem::resolveReferences() for array fields

[rv1971]

With the previous code $this->$attribute[$k] = $referencedObject, PHP issues Notice: Indirect modification of overloaded property cebe\openapi\spec\PathItem::$parameters has no effect.

The simplest fix I could think of is $this->$attribute = [ $k => $referencedObject ] + $this->$attribute.

[cebe]

Sorry, I don't understand what you are trying to fix here. Would you be able to add failing test case for this?

[rv1971]

The attached testcase.zip (3 files) is the simplest test case I could derive from my data. If you run php-openapi convert --write-json openapi.json on it, the result is

PHP Notice: Indirect modification of overloaded property cebe\openapi\spec\PathItem::$parameters has no effect in /home/rve/src/php-openapi/src/spec/PathItem.php on line 177
Notice: Indirect modification of overloaded property cebe\openapi\spec\PathItem::$parameters has no effect in /home/rve/src/php-openapi/src/spec/PathItem.php on line 177
{
"openapi": "3.0.3",
"info": {
"title": "Foo",
"version": "0.42.0"
},
"paths": {
"/foo": {
"servers": [],
"parameters": [
{
"name": "X-Param",
"in": "header"
}
]
}
}
}

Actually, despite of the notices, the result seems to be correct. To be honest, I did never check the result as such because I think this kind of notices, which suggest there is something wrong in the code, is misleading and should be avoided.

[cebe]

Thank you!